{
  "manageEntity": {
    "action": "Save",
    "entityId": "1599588252",
    "entityType": "Track",
    "nonce": "0x2283099433ee1febec18a2147fd38f7ab5353eb2cec6492f3c10a9ef287ea27d",
    "signature": "0x40168cdb40ee7f0e7f01fc4a6e915d76629938b35c9ec8259c2bd143c7ae98370baa47fba6cb54209e00219ee7e2f197ac1f7f769922c0274b013f09e3fdfe751b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}